The proportion of majors chosen varies from year to year. University majors are divided into red cards, yellow cards and green cards. Red card major is relatively unpopular, with low employment rate and unsatisfactory salary, followed by yellow card, high employment rate and high salary. Red card majors are law, biotechnology, biological science and engineering, mathematics and applied mathematics, history, bioengineering, marketing, English, international economy and trade computer. The number of college students in these majors is relatively small, and the employment of mechanical, electrical, civil and medical majors is better. However, what kind of major you choose is very important, but if you study hard, you can also become a leader in all walks of life. The choice of major can be based on your own interests and hobbies, and the major with relatively large market demand.